US6306503B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer fluoropolymer films with improved adhesion
Assignee: Honeywell International Inc
•
Filing: 1998-06-03
•
Granted: 2001-10-23
•
Expires: 2018-06-03
Abstract
Abstract Multilayer fluoropolymer films are formed from a layer of a fluoropolymer, a tie layer and a thermoplastic layer. The tie layer is a blend of an olefin-containing polymer, preferably at least one polyolefin having at least one functional moiety, such as an unsaturated carboxylic acid or anhydride thereof, and a styrene-containing polymer. Preferably, the fluoropolymer is a chlorotrifluoroethylene homopolymer or copolymer and the thermoplastic layer is a polyethylene. The preferred styrene-containing polymer is a styrene-ethylene-butylene-styrene block copolymer. These films exhibit increased adhesion between the layers as compared to a multilayer structure in which the tie layer is formed only from the olefin-containing polymer. The multilayer films are useful in packaging applications, including pharmaceutical packaging.
Inventors
- 👤 Mingliang Lawrence Tsai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:28
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/302; B32B27/32; B32B27/322; B32B27/34; B32B27/36; B32B27/365; B32B7/00; B32B7/04; B32B7/12; B32B2439/00; B32B2439/80; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/3154; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31924; Y10T428/31928; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
110 words
A multilayer film which comprises at least one fluoropolymer layer selected from the group consisting of chlorotrifluoro ethylene homopolymers, chlorotrifluoro ethylene-containing copolymers and blends thereof, and at least one thermoplastic layer comprising at least one thermoplastic homopolymer or copolymer, attached to a surface of the fluoropolymer layer by an intermediate adhesive layer, said intermediate adhesive layer comprising a blend of (1) an olefin-containing polymer selected from the group consisting of at least one functionalized polyolefin; at least one copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, alkyl acrylic acid, acrylates, and alkyl acrylates; and blends thereof and (2) a styrene-ethylene-butylene-styrene block copolymer.
Claim 2
Dependent Claim
110 words
A multilayer film which comprises at least one fluoropolymer layer selected from the group consisting of chlorotrifluoro ethylene homopolymers, chlorotrifluoro ethylene-containing copolymers and blends thereof, and at least one thermoplastic layer comprising at least one thermoplastic homopolymer or copolymer, attached to a surface of the fluoropolymer layer by an intermediate adhesive layer, said intermediate adhesive layer comprising a blend of (1) an olefin-containing polymer selected from the group consisting of at least one functionalized polyolefin; at least one copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, alkyl acrylic acid, acrylates, and alkyl acrylates; and blends thereof and (2) a styrene-ethylene-butylene-styrene block copolymer.
Claim 3
Dependent Claim
33 words
The multilayer film of claim 1 wherein said styrene-containing rubber is present in an amount of about 1 to about 35 percent by weight based on the total weight of said adhesive layer.
Claim 4
Dependent Claim
33 words
The multilayer film of claim 1 wherein said styrene-containing rubber is present in an amount of about 5 to about 20 percent by weight based on the total weight of said adhesive layer.
Claim 5
Dependent Claim
16 words
The multilayer film of claim 1 , wherein said styrene-ethylene-butylene-styrene block copolymer is diblock styrene-ethylene-butylene-styrene copolymer.
Claim 6
Dependent Claim
16 words
The multilayer film of claim 1 wherein said olefin-containing polymer is at least one functionalized polyolefin.
Claim 7
Dependent Claim
32 words
The multilayer film of claim 5 wherein said functionalized polyolefin contains at least one functional moiety selected from the group consisting of unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, amines and epoxies.
Claim 8
Dependent Claim
24 words
The multilayer film of claim 6 wherein said functionalized polyolefin has at least one functional moiety of an unsaturated carboxylic acid or anhydride thereof.
Claim 9
Dependent Claim
13 words
The multilayer film of claim 7 wherein said functional moiety is maleic anhydride.
Claim 10
Dependent Claim
13 words
The multilayer film of claim 1 wherein said functionalized polyolefin comprises a polyethylene.
Claim 11
Dependent Claim
37 words
The multilayer film of claim 1 wherein said olefin-containing polymer comprises at least one copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, alkyl acrylic acid, acrylates, and alkyl acrylates.
Claim 12
Dependent Claim
15 words
The multilayer film of claim 10 wherein said olefin-containing polymer is ethylene methyl acrylate copolymer.
Claim 13
Dependent Claim
13 words
The multilayer film of claim 1 wherein said fluoropolymer is a chlorotrifluoro-ethylene homopolymer.
Claim 14
Dependent Claim
31 words
The multilayer film of claim 1 wherein said thermoplastic layer comprises a material selected from the group consisting of polyolefins, polyamides, polyesters, polystyrene, polycarbonates, vinyl polymers, and copolymers and blends thereof.
Claim 15
Dependent Claim
13 words
The multilayer film of claim 1 wherein said thermoplastic layer comprises a polyethylene.
Claim 16
Dependent Claim
116 words
A pharmaceutical packaging material which comprises a multilayer film which comprises at least one fluoropolymer layer selected from the group consisting of chlorotrifluoro ethylene homopolymers, chlorotrifluoro ethylene-containing copolymers and blends thereof, and at least one thermoplastic layer comprising at least one thermoplastic homopolymer or copolymer, attached to a surface of the fluoropolymer layer by an intermediate adhesive layer, said intermediate adhesive layer comprising a blend of (1) an olefin-containing polymer selected from the group consisting of at least one functionalized polyolefin; at least one copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, alkyl acrylic acid, acrylates, and alkyl acrylates; and blends thereof and (2) a styrene-ethylene-butylene-styrene block copolymer.
Claim 17
Dependent Claim
116 words
A pharmaceutical packaging material which comprises a multilayer film which comprises at least one fluoropolymer layer selected from the group consisting of chlorotrifluoro ethylene homopolymers, chlorotrifluoro ethylene-containing copolymers and blends thereof, and at least one thermoplastic layer comprising at least one thermoplastic homopolymer or copolymer, attached to a surface of the fluoropolymer layer by an intermediate adhesive layer, said intermediate adhesive layer comprising a blend of (1) an olefin-containing polymer selected from the group consisting of at least one functionalized polyolefin; at least one copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, alkyl acrylic acid, acrylates, and alkyl acrylates; and blends thereof and (2) a styrene-ethylene-butylene-styrene block copolymer.
Claim 18
Dependent Claim
15 words
The pharmaceutical packaging material of claim 15 which is laminated to a layer of polyvinylchloride.
References Cited (Backward Citations)
US3481910A
Cited
US3480580A
Cited
US4317860A
Cited
US4510301A
Cited
US4677017A
Cited
EP0132583A2
Cited
US4632959A
Cited
US4544721A
Cited
US4751270A
Cited
US4612155A
Cited
US5082742A
Cited
US5139878A
Cited
US5863657A
Cited
WO1997048553A1
Cited
US5874035A
Cited
US5741840A
Cited
WO1998025762A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-10-22 | 2005-04-23 | 2005-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-10-22 | 2009-04-23 | 2009-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-10-22 | 2013-04-23 | 2013-10-23 | $7700.00 | Window Closed / Lapsed |